Sakchai Vongkittirux และ Chartchai Wibhusanawit. (2560) Comparing the Effectiveness of Printed Versus iPad Ishihara Plates in Diagnosis of Congenital Red-green Color Deficiency in Thai Male Population. <i>Eye South East Asia</i>, <i>12</i>(1), 73-77.Sakchai Vongkittirux และ Chartchai Wibhusanawit. "Comparing the Effectiveness of Printed Versus iPad Ishihara Plates in Diagnosis of Congenital Red-green Color Deficiency in Thai Male Population". Eye South East Asia 12 (2560):73-77.Sakchai Vongkittirux และ Chartchai Wibhusanawit. Comparing the Effectiveness of Printed Versus iPad Ishihara Plates in Diagnosis of Congenital Red-green Color Deficiency in Thai Male Population. Department of Ophthalmology, Faculty of Medicine, Thammasat University:ม.ป.ท. 2560.